[PATCH 06/28] x86/intel_rdt: Cleanup namespace to support RDT monitoring

From: Vikas Shivappa
Date: Tue Jul 25 2017 - 17:17:39 EST

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Few of the data-structures have generic names although they are RDT
allocation specific. Rename them to be allocation specific to
accommodate RDT monitoring. E.g. s/enabled/alloc_enabled/

No functional change.

Signed-off-by: Vikas Shivappa <vikas.shivappa@xxxxxxxxxxxxxxx>
---
arch/x86/include/asm/intel_rdt_sched.h | 4 ++--
arch/x86/kernel/cpu/intel_rdt.c | 26 ++++++++++++-------------
arch/x86/kernel/cpu/intel_rdt.h | 18 ++++++++---------
arch/x86/kernel/cpu/intel_rdt_rdtgroup.c | 33 ++++++++++++++++----------------
arch/x86/kernel/cpu/intel_rdt_schemata.c | 8 ++++----
5 files changed, 45 insertions(+), 44 deletions(-)

diff --git a/arch/x86/include/asm/intel_rdt_sched.h b/arch/x86/include/asm/intel_rdt_sched.h
index 62a70bc..4dee77b 100644
--- a/arch/x86/include/asm/intel_rdt_sched.h
+++ b/arch/x86/include/asm/intel_rdt_sched.h
@@ -27,7 +27,7 @@ struct intel_pqr_state {

DECLARE_PER_CPU(struct intel_pqr_state, pqr_state);
DECLARE_PER_CPU_READ_MOSTLY(int, cpu_closid);
-DECLARE_STATIC_KEY_FALSE(rdt_enable_key);
+DECLARE_STATIC_KEY_FALSE(rdt_alloc_enable_key);

/*
* intel_rdt_sched_in() - Writes the task's CLOSid to IA32_PQR_MSR
@@ -44,7 +44,7 @@ struct intel_pqr_state {
*/
static inline void intel_rdt_sched_in(void)
{
- if (static_branch_likely(&rdt_enable_key)) {
+ if (static_branch_likely(&rdt_alloc_enable_key)) {
struct intel_pqr_state *state = this_cpu_ptr(&pqr_state);
int closid;

diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c
index 08872e9..835e1ff 100644
--- a/arch/x86/kernel/cpu/intel_rdt.c
+++ b/arch/x86/kernel/cpu/intel_rdt.c
@@ -173,8 +173,8 @@ static inline bool cache_alloc_hsw_probe(void)
r->default_ctrl = max_cbm;
r->cache.cbm_len = 20;
r->cache.min_cbm_bits = 2;
- r->capable = true;
- r->enabled = true;
+ r->alloc_capable = true;
+ r->alloc_enabled = true;

return true;
}
@@ -224,8 +224,8 @@ static bool rdt_get_mem_config(struct rdt_resource *r)
r->data_width = 3;
rdt_get_mba_infofile(r);

- r->capable = true;
- r->enabled = true;
+ r->alloc_capable = true;
+ r->alloc_enabled = true;

return true;
}
@@ -242,8 +242,8 @@ static void rdt_get_cache_config(int idx, struct rdt_resource *r)
r->default_ctrl = BIT_MASK(eax.split.cbm_len + 1) - 1;
r->data_width = (r->cache.cbm_len + 3) / 4;
rdt_get_cache_infofile(r);
- r->capable = true;
- r->enabled = true;
+ r->alloc_capable = true;
+ r->alloc_enabled = true;
}

static void rdt_get_cdp_l3_config(int type)
@@ -255,12 +255,12 @@ static void rdt_get_cdp_l3_config(int type)
r->cache.cbm_len = r_l3->cache.cbm_len;
r->default_ctrl = r_l3->default_ctrl;
r->data_width = (r->cache.cbm_len + 3) / 4;
- r->capable = true;
+ r->alloc_capable = true;
/*
* By default, CDP is disabled. CDP can be enabled by mount parameter
* "cdp" during resctrl file system mount time.
*/
- r->enabled = false;
+ r->alloc_enabled = false;
}

static int get_cache_id(int cpu, int level)
@@ -422,7 +422,7 @@ static void domain_add_cpu(int cpu, struct rdt_resource *r)

d->id = id;

- if (domain_setup_ctrlval(r, d)) {
+ if (r->alloc_capable && domain_setup_ctrlval(r, d)) {
kfree(d);
return;
}
@@ -464,7 +464,7 @@ static int intel_rdt_online_cpu(unsigned int cpu)
struct rdt_resource *r;

mutex_lock(&rdtgroup_mutex);
- for_each_capable_rdt_resource(r)
+ for_each_alloc_capable_rdt_resource(r)
domain_add_cpu(cpu, r);
/* The cpu is set in default rdtgroup after online. */
cpumask_set_cpu(cpu, &rdtgroup_default.cpu_mask);
@@ -480,7 +480,7 @@ static int intel_rdt_offline_cpu(unsigned int cpu)
struct rdt_resource *r;

mutex_lock(&rdtgroup_mutex);
- for_each_capable_rdt_resource(r)
+ for_each_alloc_capable_rdt_resource(r)
domain_remove_cpu(cpu, r);
list_for_each_entry(rdtgrp, &rdt_all_groups, rdtgroup_list) {
if (cpumask_test_and_clear_cpu(cpu, &rdtgrp->cpu_mask))
@@ -501,7 +501,7 @@ static __init void rdt_init_padding(void)
struct rdt_resource *r;
int cl;

- for_each_capable_rdt_resource(r) {
+ for_each_alloc_capable_rdt_resource(r) {
cl = strlen(r->name);
if (cl > max_name_width)
max_name_width = cl;
@@ -565,7 +565,7 @@ static int __init intel_rdt_late_init(void)
return ret;
}

- for_each_capable_rdt_resource(r)
+ for_each_alloc_capable_rdt_resource(r)
pr_info("Intel RDT %s allocation detected\n", r->name);

return 0;
diff --git a/arch/x86/kernel/cpu/intel_rdt.h b/arch/x86/kernel/cpu/intel_rdt.h
index 0e4852d..29630af 100644
--- a/arch/x86/kernel/cpu/intel_rdt.h
+++ b/arch/x86/kernel/cpu/intel_rdt.h
@@ -135,8 +135,8 @@ struct rdt_membw {

/**
* struct rdt_resource - attributes of an RDT resource
- * @enabled: Is this feature enabled on this machine
- * @capable: Is this feature available on this machine
+ * @alloc_enabled: Is allocation enabled on this machine
+ * @alloc_capable: Is allocation available on this machine
* @name: Name to use in "schemata" file
* @num_closid: Number of CLOSIDs available
* @cache_level: Which cache level defines scope of this resource
@@ -152,8 +152,8 @@ struct rdt_membw {
* @parse_ctrlval: Per resource function pointer to parse control values
*/
struct rdt_resource {
- bool enabled;
- bool capable;
+ bool alloc_enabled;
+ bool alloc_capable;
char *name;
int num_closid;
int cache_level;
@@ -181,7 +181,7 @@ struct rdt_resource {

extern struct rdt_resource rdt_resources_all[];
extern struct rdtgroup rdtgroup_default;
-DECLARE_STATIC_KEY_FALSE(rdt_enable_key);
+DECLARE_STATIC_KEY_FALSE(rdt_alloc_enable_key);

int __init rdtgroup_init(void);

@@ -196,15 +196,15 @@ enum {
RDT_NUM_RESOURCES,
};

-#define for_each_capable_rdt_resource(r) \
+#define for_each_alloc_capable_rdt_resource(r) \
for (r = rdt_resources_all; r < rdt_resources_all + RDT_NUM_RESOURCES;\
r++) \
- if (r->capable)
+ if (r->alloc_capable)

-#define for_each_enabled_rdt_resource(r) \
+#define for_each_alloc_enabled_rdt_resource(r) \
for (r = rdt_resources_all; r < rdt_resources_all + RDT_NUM_RESOURCES;\
r++) \
- if (r->enabled)
+ if (r->alloc_enabled)

/* CPUID.(EAX=10H, ECX=ResID=1).EAX */
union cpuid_0x10_1_eax {
diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
index 3273e88..ce63d10 100644
--- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
+++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
@@ -35,7 +35,7 @@
#include <asm/intel_rdt_sched.h>
#include "intel_rdt.h"

-DEFINE_STATIC_KEY_FALSE(rdt_enable_key);
+DEFINE_STATIC_KEY_FALSE(rdt_alloc_enable_key);
static struct kernfs_root *rdt_root;
struct rdtgroup rdtgroup_default;
LIST_HEAD(rdt_all_groups);
@@ -66,7 +66,7 @@ static void closid_init(void)
int rdt_min_closid = 32;

/* Compute rdt_min_closid across all resources */
- for_each_enabled_rdt_resource(r)
+ for_each_alloc_enabled_rdt_resource(r)
rdt_min_closid = min(rdt_min_closid, r->num_closid);

closid_free_map = BIT_MASK(rdt_min_closid) - 1;
@@ -638,7 +638,7 @@ static int rdtgroup_create_info_dir(struct kernfs_node *parent_kn)
return PTR_ERR(kn_info);
kernfs_get(kn_info);

- for_each_enabled_rdt_resource(r) {
+ for_each_alloc_enabled_rdt_resource(r) {
kn_subdir = kernfs_create_dir(kn_info, r->name,
kn_info->mode, r);
if (IS_ERR(kn_subdir)) {
@@ -718,14 +718,15 @@ static int cdp_enable(void)
struct rdt_resource *r_l3 = &rdt_resources_all[RDT_RESOURCE_L3];
int ret;

- if (!r_l3->capable || !r_l3data->capable || !r_l3code->capable)
+ if (!r_l3->alloc_capable || !r_l3data->alloc_capable ||
+ !r_l3code->alloc_capable)
return -EINVAL;

ret = set_l3_qos_cfg(r_l3, true);
if (!ret) {
- r_l3->enabled = false;
- r_l3data->enabled = true;
- r_l3code->enabled = true;
+ r_l3->alloc_enabled = false;
+ r_l3data->alloc_enabled = true;
+ r_l3code->alloc_enabled = true;
}
return ret;
}
@@ -734,11 +735,11 @@ static void cdp_disable(void)
{
struct rdt_resource *r = &rdt_resources_all[RDT_RESOURCE_L3];

- r->enabled = r->capable;
+ r->alloc_enabled = r->alloc_capable;

- if (rdt_resources_all[RDT_RESOURCE_L3DATA].enabled) {
- rdt_resources_all[RDT_RESOURCE_L3DATA].enabled = false;
- rdt_resources_all[RDT_RESOURCE_L3CODE].enabled = false;
+ if (rdt_resources_all[RDT_RESOURCE_L3DATA].alloc_enabled) {
+ rdt_resources_all[RDT_RESOURCE_L3DATA].alloc_enabled = false;
+ rdt_resources_all[RDT_RESOURCE_L3CODE].alloc_enabled = false;
set_l3_qos_cfg(r, false);
}
}
@@ -834,7 +835,7 @@ static struct dentry *rdt_mount(struct file_system_type *fs_type,
/*
* resctrl file system can only be mounted once.
*/
- if (static_branch_unlikely(&rdt_enable_key)) {
+ if (static_branch_unlikely(&rdt_alloc_enable_key)) {
dentry = ERR_PTR(-EBUSY);
goto out;
}
@@ -858,7 +859,7 @@ static struct dentry *rdt_mount(struct file_system_type *fs_type,
if (IS_ERR(dentry))
goto out_destroy;

- static_branch_enable(&rdt_enable_key);
+ static_branch_enable(&rdt_alloc_enable_key);
goto out;

out_destroy:
@@ -986,11 +987,11 @@ static void rdt_kill_sb(struct super_block *sb)
mutex_lock(&rdtgroup_mutex);

/*Put everything back to default values. */
- for_each_enabled_rdt_resource(r)
+ for_each_alloc_enabled_rdt_resource(r)
reset_all_ctrls(r);
cdp_disable();
rmdir_all_sub();
- static_branch_disable(&rdt_enable_key);
+ static_branch_disable(&rdt_alloc_enable_key);
kernfs_kill_sb(sb);
mutex_unlock(&rdtgroup_mutex);
}
@@ -1129,7 +1130,7 @@ static int rdtgroup_rmdir(struct kernfs_node *kn)

static int rdtgroup_show_options(struct seq_file *seq, struct kernfs_root *kf)
{
- if (rdt_resources_all[RDT_RESOURCE_L3DATA].enabled)
+ if (rdt_resources_all[RDT_RESOURCE_L3DATA].alloc_enabled)
seq_puts(seq, ",cdp");
return 0;
}
diff --git a/arch/x86/kernel/cpu/intel_rdt_schemata.c b/arch/x86/kernel/cpu/intel_rdt_schemata.c
index 8cef1c8..952156c 100644
--- a/arch/x86/kernel/cpu/intel_rdt_schemata.c
+++ b/arch/x86/kernel/cpu/intel_rdt_schemata.c
@@ -192,7 +192,7 @@ static int rdtgroup_parse_resource(char *resname, char *tok, int closid)
{
struct rdt_resource *r;

- for_each_enabled_rdt_resource(r) {
+ for_each_alloc_enabled_rdt_resource(r) {
if (!strcmp(resname, r->name) && closid < r->num_closid)
return parse_line(tok, r);
}
@@ -221,7 +221,7 @@ ssize_t rdtgroup_schemata_write(struct kernfs_open_file *of,

closid = rdtgrp->closid;

- for_each_enabled_rdt_resource(r) {
+ for_each_alloc_enabled_rdt_resource(r) {
list_for_each_entry(dom, &r->domains, list)
dom->have_new_ctrl = false;
}
@@ -237,7 +237,7 @@ ssize_t rdtgroup_schemata_write(struct kernfs_open_file *of,
goto out;
}

- for_each_enabled_rdt_resource(r) {
+ for_each_alloc_enabled_rdt_resource(r) {
ret = update_domains(r, closid);
if (ret)
goto out;
@@ -274,7 +274,7 @@ int rdtgroup_schemata_show(struct kernfs_open_file *of,
rdtgrp = rdtgroup_kn_lock_live(of->kn);
if (rdtgrp) {
closid = rdtgrp->closid;
- for_each_enabled_rdt_resource(r) {
+ for_each_alloc_enabled_rdt_resource(r) {
if (closid < r->num_closid)
show_doms(s, r, closid);
}
--
1.9.1

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